如何获得ThunderCore上的帐户余额？

Question

我想以编程方式查询地址或地址列表的余额。做这件事最好的方法是什么？

Answer 1

要在最新的块中获得0xc466c8ff5dAce08A09cFC63760f7Cc63734501C1的余额，请执行以下操作：

curl -X POST -H 'Content-Type: application/json' -s --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0xad23b02673214973e354d41e19999d9e01f3be58", "latest"], "id":1}' https://mainnet-rpc.thundercore.com/

输出：{"jsonrpc":"2.0","id":1,"result":"0xde0b6b3a7640000"}

用web3.js获取单个帐户的余额

const Eth = require('web3-eth');
const Web3 = require('web3');
const web3Provider = () => {
  return Eth.giveProvider || 'https://mainnet-rpc.thundercore.com';
}
const balance = async (address) => {
  const eth = new Eth(web3Provider());
  return Web3.utils.fromWei(await eth.getBalance(address));
}

样本会话

const address = '0xc466c8ff5dAce08A09cFC63760f7Cc63734501C1';
await balance(address) // -> '1'

单位

• 0xde0b6b3a7640000等于10**18
• 使用虚词术语，fromWei将10^18 Wei转换为1 Ether，或使用1术语
• 使用ThunderCore术语，fromWei将10^18 Ella转换为1 TT
• fromWei(0xde0b6b3a7640000)等于fromWei(10**18) = 1

请求批处理查询余额

• 对于地址数组，可以使用JSON-RPC2.0的批处理请求来节省网络往返行程。
• 查询https://mainnet-rpc.thundercore.com时，将批处理大小限制在30周围

下面的类封装web3.js-1.2.6的BatchRequest并使其返回Javascript Promise

class BatchRequest {
  constructor(web3) {
    this.b = new web3.BatchRequest();
    this.results = [];
    this.resolve = null;
    this.reject = null;
    this.resultsFilled = 0;
  }
  web3BatchRequestCallBack(index, err, result) {
    /* if any request in our batch fails, reject the promise we return from `execute` */
    if (err) {
      this.reject(new Error(`request ${index} failed: ${err}`))
      return;
    }
    this.results[index] = result;
    this.resultsFilled++;
    if (this.resultsFilled === this.results.length) {
      this.resolve(this.results);
    }
  }
  resultPromiseExecutor(resolve, reject) {
    this.resolve = resolve;
    this.reject = reject;
  }
  add(method /* web3-core-method.Method */) {
    const index = this.results.length;
    method.callback = (err, result) => {
      this.web3BatchRequestCallBack(index, err, result)
    };
    this.b.add(method);
    this.results.push(undefined);
  }
  execute() /*: Promise */ {
    const p = new Promise((resolve, reject) => { this.resultPromiseExecutor(resolve, reject) });
    /* must arrange for resultPromiseExecutor to be called before b.execute */
    this.b.execute();
    return p;
  }
}

const balanceBatch = async (addresses) => {
  const eth = new Eth(web3Provider());
  const b = new BatchRequest(eth);
  for (a of addresses) {
    b.add(eth.getBalance.request(a));
  }
  const ellaS = await b.execute();
  const ttS = [];
  for (e of ellaS) {
    ttS.push(Web3.utils.fromWei(e));
  }
  return ttS;
}

batch-balance-test.js

const Web3 = require('web3');
(async() => {
  const web3 = new Web3('https://mainnet-rpc.thundercore.com');
  const results = await balanceBatch([
    '0xc466c8ff5dAce08A09cFC63760f7Cc63734501C1',
    '0x4f3c8e20942461e2c3bdd8311ac57b0c222f2b82',
  ]);
  console.log('results:', results);
})();

样本会话

$ node batch-balance-test.js
results: [ '1', '84.309961496' ]

请参阅这里回购的balance分支中的完整项目设置field-support。